Microwave induced zero-conductance state in a Corbino geometry two-dimensional electron gas with capacitive contacts

Microwave induced photoconductivity of a two-dimensional electron gas in selectively doped GaAs/AlAs heterostructures has been studied using the Corbino geometry with capacitive contacts at a temperature T=1.6 K and magnetic field B up to 0.5 T. Zero-conductance states have been observed in the samp...

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Bibliographic Details
Published inApplied physics letters Vol. 97; no. 8
Main Authors Bykov, A. A., Marchishin, I. V., Goran, A. V., Dmitriev, D. V.
Format Journal Article
LanguageEnglish
Published United States 23.08.2010
Subjects
ALUMINIUM ARSENIDES
ALUMINIUM COMPOUNDS
ARSENIC COMPOUNDS
ARSENIDES
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
DOPED MATERIALS
ELECTRIC CONDUCTIVITY
ELECTRIC CONTACTS
ELECTRICAL EQUIPMENT
ELECTRICAL PROPERTIES
ELECTROMAGNETIC RADIATION
ELECTRON GAS
GALLIUM ARSENIDES
GALLIUM COMPOUNDS
HETEROJUNCTIONS
MAGNETIC FIELDS
MATERIALS
MATERIALS SCIENCE
MICROWAVE RADIATION
PHOTOCONDUCTIVITY
PHYSICAL PROPERTIES
PNICTIDES
RADIATIONS
SEMICONDUCTOR JUNCTIONS
SEMICONDUCTOR MATERIALS
TEMPERATURE RANGE
TEMPERATURE RANGE 0000-0013 K
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Summary:Microwave induced photoconductivity of a two-dimensional electron gas in selectively doped GaAs/AlAs heterostructures has been studied using the Corbino geometry with capacitive contacts at a temperature T=1.6 K and magnetic field B up to 0.5 T. Zero-conductance states have been observed in the samples under study subject to microwave radiation, similarly to the samples with Ohmic contacts. It has been shown that Ohmic contacts do not play a significant role for observation of zero-conductance states induced by microwave radiation.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.3483765